I am having troubles with the validating of functions. I need to validate my variables and make sure that you can not enter through with out giving a name or number. What am I doing wrong that this is not working?

<script>
    var candyName = false;
    var pricePerLb;
    var numOfLbs;
    var message;
    
    candyName = prompt("Enter the name of the candy: ");
    while(candyName == false){
        alert("Blank is invalid. Enter valid name: ");
        candyName = prompt("Enter the name of the candy: ");
    }

    pricePerLb = parseFloat(prompt("Enter the price per pound: "));
    

    numOfLbs = parseInt(prompt("Enter the average number of pounds sold in a month: "));
    

    if(numOfLbs > 2000 || pricePerLb > 10){
        message = candyName + " that costs $" + pricePerLb + " is sold, on average, " + 
numOfLbs + " lbs a month are a best-selling item.";
    }else{
        message = candyName + " are not a best-selling item.";
    }

    function validate(candyName){
    if(candyName != ""){
        valid = true;
    }else{
        valid = false;
        alert("Blank is invalid: ");
    }
    return valid;


    alert(message);

</script>